REALLY good rap/sortof rock song!!! HELP

ok so i heard this song on the radio that was rap, but had kinda a metal-rock vibe
at the beginning it said westcoast a few times
and it mainly said "she says she loves me but she loves me not" and also something about diamonds
there were two different male voices
if you could help me out, thatd be great
thankss

E-40 - She Say She Loves Me... it doent say west coast in the beginning but hes from cali

She Say She Loves Me - E-40 Music - MP3 Stream on IMEEM

thanks but that wasnt it